Brush for suction-cleaners



H. E. HOOVER. BRUSH FOR SUCT |ON CLEANERS. APPL|cAT|0N r|LED1uLY14. 19u.

1,332,897. Pated Ma1-.9,1920.'

' ttorngyp' UNITED sTATEs PATENT oEEroE.

HOWARD EARL HOOVER, 0F CHICAGO, ILLINOIS, ASSIGN OR TO HOOVER SUCTION SWEEPER COMPANY, OF NEW BERLIN, OHIO, A CORPORATION OF OHIO.

BRUVSH FOR SUCTION-CLEANERS.

Specification of Letters Patent.

Patented Mar. 9, 1920.

Application filed July 14, 1917. Serial No. 180,516.

To all whom. t may Concern.'

Be it known that I, HOWARD EARL HOOVER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a` certain new and useful Improvement in Brushes for Suction- Cleaners, of which the following is a specilication.

My invention relates to brushes particularly adapted for use in connection with suction cleaners. It is illustrated in the accompanying drawings wherein,

Figure l is apart end and sectional view of a vacuum cleaner with parts broken away to show the-brush in position;

Fig. 2 is an elevation of a detached brush; and

Fig. 3 is an elevation of a modified form of brush.

Like parts are indicated by the same letter in all the figures.

A is the case of a suction cleaner, B the fan by whose motion air is drawn in through the mouth C, past the brush D. The fan and brush are driven in any desired manner v by any form of mechanism, preferably an electric motor mounted on or within the casing. None of these details is of any impoi-tance in the present case so they are not here illustrated.

E is a cylindrical brush body through which passes a shaft N, and thls shaft is suitably mounted in any desired manner and preferably provided with thread guards F for the bearings on the shaft within the cylindrical brush body.l

G, G are a series of bosses on the brush. They may be formed in the casting, or they may be separately formed and Iscrewed in or otherwise attached to the cylindrical body. H, H are the bristles arranged in groups in these bosses.

J is a continuous spiralridge projecting from the body of the. brush and bristlel groups may be arranged therealong. If the body is heavy enough, the bunches of bristles might be attached thereto without bosses or ridges.

K is the driving pulley, preferably integral Withthe brush body and placed either near the "middle or at one end as may be desired, or as required by thedesign of the suction cleaner.

The groups of bristles are arranged in one continuous spiral from end to end and nearly entirely surrounding the brush body. The groups of bristles are placed so as to overlap in the longitudinal direction or so as to leave no unswept portion of the carpet or covering against which the brush is operated. If the pulley `is between the ends of the body, then two such groups of bristles should be placed one on each side of the pulley and close thereto so that they may .as nearly as possible bridge the space overy the pulley. If the pulley is placed at one end of the brush body, the last group of bristles at that end should be placed in close proximity to the pulley so as to overhang it as much as possible. The groups of bristles should be uniformly spaced with respect to their distance from each other tance between any two adjacent groups.

The arrangement 'of the bristles in groups is of course only the preferred form, as they might be arranged in a solid continuous spiral line, but such arrangement should be according to the principles above suggested.

This arrangement of the bristleswhether in groups or a continuous line, results in balancing the brush and giving it a constant load. There is always `one group of bristles or one section of bristles of a given size and only such group or section in Contact with 'the surface to be cleaned. The work of the brush and of the motor is therefore uniform and balanced so as to avoid irregularity of action. If bristle groups are used they must of course be placed closer together than if they were arranged in two or more spiral lines where the individual groups of successive groups may be staggered with reference to one anothen Another result from the use of such a brush in a suction cleaner is that it permitsl with a given brush rotation the use of a high speed and therefore light and relatively cheap motor.

It will be understood, of course, that such a brush has the double function of sweepingand vibrating or beating the carpet or `yfloor covering, and since there is but one e such beating or vibrating eect .for each rotation of the broush, a relatively high speed motor may be-employed, or a motor with twice the speed of one used with a two spiral brush in order to have the same number of vibratory actions in a given time.

' from` the spirit of my invention.

f may be suitabl mouthand is driven by a belt or other power l This brush therefore permits the manufacture with a predetermined or established number of vibrations to have a higher speed, lighter and'cheaper motor. y

We have not dwelt upon the details of the manufacture of the brush or of a suction cleaner or the `several connected parts. y

As previously suggested, I wish my drawings-to be taken as diagrammatic, for while they do represent ia substantially working v form of device,'nevertheless very material departures in size, construction or arrange'- ment ofthe several'parts1 or elements'of parts vmight4 be made without., departing I have only shown preferred forms. l

The use and operation of my invention are obvious from what has been already said. Such a brush when used in a suction sweeper mounted in or near the transmission from the motor, which preferably also drives the fan. The brush isP given a relatively high speed of rotation and 1s supported in such manner that the carpet jacent tufts of bristles.'v

' which is raise by the vibration.

- ranged 4radially t ereabout pe or floor covering preferably drawn up to the mouth is both brushed and beaten bythe brush. A longitudinal section of the ioorl covering as it successively encounters agiven groupor section of bristles, receives a blowv therefrom with, every revolution and that blow is what eiect. Suchl ristlesyals as they pass by, sweep the car t, carrying-away the dirt The particular arrangement of .the bristles or grou s of bristles as shown is de- Jsigned toba ance the brush and motor, but

of course if that were unimportant, the sin gle spiral, could havel a/ travell equal, to a circle.

I claim:- f 1. A brush comprising a body and arranged radially thereabout perpendicular to the axis of rotaton from end to end, a single spiral row of bristles approximately encircling the body-and means ywhereby said brush body' is adapted to be rotatably mounted. v

2. A brush comprising abody and arranged radially thereabout perpendicular to the 'axis of rotation, 'a singlespiral row of 4bristles whose travel'is less than a circle by an amount equal tothe distance betweenadand' ar-- ndlcular e axlsl of rotation from en to end a,

3l A brush com rising abody to t gives the 4carpet the vibrating single spiral row of bristles approximately encircling the body, said bristles arranged in groups and means whereby saidbrush body is adapted to bel-rotatably mounted. 4. A brush comprising a body and arranged radially th'ereabout perpendicular to the axis of rotation from end to endA a single .spiral row Aof bristles whose travel is less 6. A brush' comprising a body and `arranged radially thereabout perpendicular to the axis of rotation Afromend to end a single spiral rowof bristles whose travel is less than a circle by an amount equal to the distance between adjacent tufts of bristles, said body provided with a driving belt pulley andthe bristles arranged in close proximity thereto so as to overhang su'ch pulley.

7. A brush comprising a body and ar ranged radially thereabout perpendicular to` the axis of rotation from end to end a single spiral row -.of bristles approximately encirc ing/the body, said bristles arranged in groups, said body. rovided with a driving belt pulley and the bristles arranged in close proximity thereto so as to overhang such pulley and means whereby said brush bod is adaptedv to be rotatably mounted.

8. A brush comprising a body and arranged radially thereabout perpendicular to the axis of rotation from end to end a -single spiral row .of bristles whose ltravel is less than a circle by an amount equal to the distanceV between adjacent tufts of bristles, said bristles arranged in grou s, said body provided with avdriving be t pulley and the bristles arranged in close roximity thereto` so as to overhang such pu ley.

a 9. A brush comprising a body anda single row of bristles ap roximately encircling the body arranged ra ially perpendicular to the axis of rotation from end to end in contiguousfgroups, the angular distance between the first and last group being approximately the same as the angular distance between anyl two adjacent groupsv andv means whereby 'said brush body is adapted to be rotatab y mounted; f

10. A brush comprising a body and a single row of bristles ap roximately encircling the body arranged ra ially perpendicular to the axis of rotation from` end to end in contiguous groups, the angularv distance between the two adj acentgroups, and a driving belt pul ley on the brush body with bristles adjacent thereto so as `to overhang the pulley and means whereby said brush body is adapted to be rotatably mounted.

11. The combination with a suction cleaner having an open-mouthed suction nozzle, of a brush mounted for rotation therein comprising a brush body, and 'arrangedradially thereabout from end to end, a single spiral row of bristles approximately encircling the body.

12. The combination with a suction Acleaner -having an open-,mouthed suction encircling the body, and a motor mounted on the cleaner and means whereby the brush v .is driven from the motor.

18. The combination with a suction cleaner having an open-mouthed suction nozzle, of a brush body mounted for rotation therein, a motor mounted on the cleaner,

a fan contained in the cleaner, means whe-reby the brush and fan are driven from the motor, said brush body having arranged radially thereabout from end to end a single spiral row of bristles approximately encircling the body. y i

In testimony whereof, I aX my signature in the presence of two witnesses this 2nd day of July 1917.

HOWARD EARL HOOVER. Witnesses:

MINNIE M. LINDENAU, LAUREL M. DoREMUs. 

